Celebrities work hard to look good. Find out how they stay fit. By Erika Garcia.

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Shakira

The Colombian singer has a diet low in fat, lots of protein and fresh fruits and vegetables. She uses machines such as the elliptical, and three dumbbells for light weighting and dancing to stay in shape, according to howcelebritiesloseweight.com. Her training program includes six days a week of 60-minute strength fitness training and 40 minutes of cardio through dance.

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To call it a workout, she says, she has to sweat. “I like to push myself…I do the cha cha on the treadmill to mix things up,” she told Fox News Latino’s Bianca Jade. She says she does spinning classes to tame her Latin curves – though she has no interest in losing them.

(Moises De Pena)

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Sofía Vergara

The Colombian stunner says just the thought of doing fitness training exercises puts her in a bad mood, according to howcelebritiesloseweight.com. The "Modern Family" star Latin dances as a form of cardio exercise and does dance fitness exercises for an hour three times a week.

She says her fitness program is to stay healthy, not necessarily to lose weight. “You need a little fat in your face…,” she said, according to the website. “I don’t want plastic surgery or fillers or Botox.”

(2010 Getty Images)

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Cameron Díaz

Díaz has a passion for high-energy sports but she still has to watch what she eats. According to howcelebritiesloseweight.com, she starts her day with protein, mostly chicken which is low in fat and high in protein, and eats six low-carb meals per day.

The actress of Cuban descent does 25-30 minutes of cardio exercise and weights plus reverse lunge exercises and wide plies exercises. For ab definition, she does elliptical machines, cycling exercises, kayaking and Pilates.

“You need to burn fat with cardio exercises to see ab definition,” she said, according to the website.

(2011 Getty Images)

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Mario López

López doesn’t count calories, or fat grams, buts eats healthy snacks all day long. “I love to eat,” he said, according to howcelebritiesloseweight.com.

But he admits he’s addicted to exercising. He bikes, runs, swims, does yoga, plays basketball and does weight training and boxes three times a week. “I like to mix it up because I don’t want to get bored. You keep your muscles guessing, and you stay motivated,” he said, according to the website.

(2010 Getty Images)

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Salma Hayek

Hayek says she eats what she likes, and eats in a way that keeps her energy up. She eats a balanced diet and uses portion control and, according to howcelebritiesloseweight, she says she eats so well she doesn’t have to work out.

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Penelope Cruz

The Spanish Academy Award winner Cruz loves pizza and used to eat In-N-Out once a week. She eats healthier now, keeping her carbs to a minimum. She claims her secret to staying thin is sleeping 12 hours a day, according to howcelebritiesloseweight.com.

She does exercise hard, and loves to go for walks, take dance classes and swims. “Workouts aren’t just about burning calories, they’re about getting in shape for the things you love,” she said, according to the website.

(2010 Getty Images)

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Mariah Carey

Carey eats small, balanced mini meals all day long. She says her diet consists of “soups and fish prepared really blandly,” according to howcelebritiesloseweight.com. She follows a routine of aerobics exercise and exercise bikes, and swims for added resistance.

(2009 Getty Images)

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Jessica Alba

So fearful about being plump because she comes from an overweight family, Alba has been watching her weight since she was 12. She believes in portion control and has salad for lunch and vegetables and chicken or fish for dinner. She does not eat bread, and tries to stay away from desserts.

Her workout routine includes 45 minutes to an hour of cardio (treadmill, elliptical machine or sometimes Kung Fu or kickboxing) and does 50 lunges and crunches, according to howcelebritiesloseweight.com. She then exercises her shoulders, biceps and triceps.

(2010 Getty Images)

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Jennifer López

What's Puerto Rican sensation Jennifer López's secret? She doesn’t ban anything from her diet, never goes on diets, and says she’s no fitness or health freak, according to howcelebritiesloseweight.com.

To lose weight, she sticks to 1,200 to 1,400 calories a day, eating lean protein, fruits, vegetables and good fats. She exercises for 60-90 minutes a day – doing a mixture of treadmill, elliptical, rowing machine, stationary bike and weight training.

(2011 Getty Images)

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Eva Longoria

This Mexican beauty has a diet high in vegetables and fruits. Her workout includes cardio and strength workouts three to four times a week, according to howcelebritiesloseweight.com. She does kickboxing and weight-training sessions regularly.

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Christina Aguilera

Aguilera’s fitness trainer, Tee Sorge, created an exercise program that includes 50-minute long sessions three times a week.

According to howcelebritiesloseweight.com, Aguilera, an A-list singer who is half Ecuadorian, does strength fitness training two to five times a week and does 300 to 500 sit-ups a session.

For her diet, a private chef cooks healthier versions of her favorite foods and, when she wants to lose weight, she cuts the white – no white rice, flours or sugars, according to the website.

(AP)

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Ricky Martin

The Puerto Rican singer reportedly stays in shape by doing Zumba, a Latin high-energy exercise routine, according to howcelebritiesloseweight.com. TMZ reported he spent $10,000 on 200 Zumba DVDs he gave away to family and friends.

(2010 Getty Images)

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Eva Mendes

The Cuban-American actress admits to eating junk food a lot. To lose weight, she follows the 5 Factor Diet, which consists of eating five meals, including snacks, throughout the day, according to howcelebritiesloseweight.com. She told Harper’s Bazaar she works out four to six times a weeks because she likes her “pasta” and “biscuits.” “My Cuban heritage means if the zipper doesn’t zip up the whole way, we just say screw it!”

(2010 Getty Images)

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Adriana Lima

Brazilian runway model Lima likes to keep in shape by doing Capoeira – a Brazilian martial arts routine combining dance, aerobics and play fighting – and hits the treadmill, jumps rope or runs for 30 minutes a day, according to Hollyscoop.com.

To lose the 35 pounds she gained during her pregnancy, Lima followed a strict no-carb, all-protein weight-loss diet plan for several weeks and stuck to her exercise program for one to two hours a day. Every day, her fitness trainer would make her do boxing, jump rope and other high-impact cardio exercises, according to howcelebritiesloseweight.com.

Lima loves to play sports on the beach, runs 4 miles three times a week and does Pilates, according to the website.

(2010 Getty Images)

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Daisy Fuentes

The Cuban-American model and TV personality says she eats well and exercises regularly. To kick up her workout, she uses weights and stability balls during Pilates. She tells Fitness magazine she’s “definitely not a cardio-machine girl” and says she owns a treadmill but barely uses it. Instead, she plays tennis, goes on long hikes and does kickboxing, according to howcelebritiesloseweight.com.

(2009 Getty Images)

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Zoe Saldaña

Saldaña says she’s stays thin because she’s always on the go. “I never want to deprive myself of food just because I want to lose weight,” said Saldaña, according to howcelebritiesloseweight.com. She does Pilates three times a week and sometimes takes walks for 15 minutes.

“I’m very accepting with my age. It’s like notches on your belt: experience, wisdom, and a different kind of beauty…,” she said, according to the website. “But God as my witness, I am going to try to do everything I can in terms of having a fitness exercise program that will keep this ass together for as long as I possibly can-without going against nature.”

(2010 Getty Images)

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Dania Ramírez

Dominican TV star Ramírez follows a diet that consists mainly of eating healthy fats and healthy carbohydrates. She does cardio and strength training for an hour and a half three times a week. She focuses on her glutes, legs and abs, and likes to speed skate and slide on gliding discs, according to howcelebritiesloseweight.com.